Keyboard backlight module and manufacturing method thereof
US10948651B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2019 |
| Grant date | Mar 16, 2021 |
| Priority date | — |
| Expiry date | Nov 6, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2219/062
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A keyboard backlight module includes a light-guiding sheet, a circuit board, a light-emitting element, a reflective sheet and a release film. The circuit board is located on a surface of the light-guiding sheet, and the reflective sheet is located on another surface of the light-guiding sheet opposite to the circuit board. The light-emitting element is located between the circuit board and the light-guiding sheet, and disposed on the circuit board. The light-emitting element emits light into the light-guiding sheet. The release film is located on the light-guiding sheet and the circuit board, and transfers a glue layer on the surface of the light-guiding sheet. The light-guiding sheet includes a plurality of illuminated patterns, and the keyboard backlight module adjusts the illumination uniformity of the light through the reflective sheet, the glue layer and the plurality of illuminated patterns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.